From https://www.usps.com/business/web-tools-apis/address-information-api.htm:
The Verify API supports up to five lookups per transaction
It looks to me as though validate_address should accept a list of Address (or perhaps) be a wrapper over a new validate_addresses method)
From https://www.usps.com/business/web-tools-apis/address-information-api.htm:
It looks to me as though
validate_addressshould accept a list of Address (or perhaps) be a wrapper over a newvalidate_addressesmethod)